Hydraulic Oil Temperature Sensor Circuit Malfunction
The P0937 code indicates a problem in the hydraulic oil temperature sensor circuit, typically found in vehicles with automatic transmissions or hydraulic systems. The sensor monitors fluid temperature to prevent overheating and ensure proper operation. A fault in the circuit can cause incorrect temperature readings, leading to transmission shifting issues or limp mode.
01. Most Common Causes
- Faulty hydraulic oil temperature sensor
- Open or shorted wiring in the sensor circuit
- Poor electrical connection at the sensor or PCM
- Damaged connector or corrosion
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission shifting harsh or erratic
- Transmission enters limp mode
- Overheating transmission fluid
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the sensor and wiring for damage or corrosion.
Step 3: Test sensor resistance and compare to specifications.
Step 4: Check voltage and ground at the sensor connector.
Step 5: If wiring and sensor are good, test PCM output.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a faulty hydraulic oil temperature sensor can cause transmission overheating and damage, leading to costly repairs.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and whether the sensor or wiring needs replacement.